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The digital + intelligent forces formed by AI-CPS OS stimulate economic growth in three ways:This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows:But in that case, Not even considering so many dangers, This performance of '74 spray' is of great use, I remember there were 4 '74 spray' on the position at that time, There are two recruits who operate them. Two veterans, Both veterans were squad leaders, All have the skills of air injection, Facing the big wasp descending from the pavement, The two of them were obviously forced to hurry, Take up the '74 spray' and aim at the position where the big wasp is relatively concentrated in the sky and spray it out. If it weren't for the critical situation at that time, the two squad leaders would definitely not have this kind of "dangerous operation", while the other two recruits watched the veterans take the lead and learned to do so. Although they had not received relevant training and the accuracy of spraying was not as good as that of veterans, they finally sprayed out and did not hurt themselves or other comrades in arms.To sum up, MindManager, Xmind and Freemind are all very practical mind mapping software, each with its own characteristics and powerful functions. Those who need Xmind and Freemind can click on the link below to download them.ch3 Suthra和Oum因为一场意外相识，在争吵中两人的心慢慢走近，这时，Suthra发现Oum是自己仇人的女儿，于是对Oum展开了报复，最终Suthra能否放下仇恨直面自己的爱情吗　　第四季，Sarah会去找一个与Beth Childs密切相关的盟友。循着Beth的足迹，Sarah找到的是一个新的潜在的敌人，带她进入新的恐怖境地。Mulder and Scully learn that they aren't the only ones desperately searching for their long-lost son, William. The very fate of the world may depend on the outcome.